Designing an interwar cruiser around 9.2-inch guns

How would you design an interwar cruiser differently from the ships that existed?

Either improve a 6-inch cruiser or build a fast 15,000-18,000-ton ship with fifteen 9.2-inch guns, good armor and range, strong anti-aircraft weapons, and a substantial torpedo battery.

One option is an improved Town- or Brooklyn-style 6-inch cruiser with better armour and range. The larger alternative displaces roughly 15,000-18,000 tons, makes about 36 knots, and carries five triple 9.2-inch turrets, air-defence-oriented secondary weapons and four quadruple torpedo launchers. Before radar, visibility and identification often restricted 6-inch and 8-inch cruisers to similar likely engagement ranges. More numerous, faster-firing 6-inch guns could then damage an opponent enough to stop it fighting before heavier shells achieved a decisive penetration. The 9.2-inch preference rests on a larger shell and greater penetration at roughly an 8-inch gun's rate of fire. Italian gun tables illustrate the difference between maximum range, exceptional visibility and expected combat range. Shell flight time imposes another limit: the discussion gives Yamato's extreme-range time as nearly 100 seconds, during which the target can change course.